nucleus

But sperm don't have elaborate cells, just a tightly packed nucleus and a tail for swimming to the egg.

但是精子没有明确的细胞结构，只有一个紧密组装的细胞核以及一个便于游动到卵细胞的尾巴。

As a comet gets closer to the sun, the ice on the surface of the nucleus begins turning into gas, forming a cloud known as the coma.

当彗星接近太阳时，慧核表面的冰便升华成气体，形成了我们称为“彗发”的雾状结构。

Just as the sun is the central body of the solar system, so the nucleus is the CORE of the atom.

正象太阳是太阳系的中心天体一样，原子核是原子的核心。

The results show that the vaterite is usually distributed around the nucleus and few on the surface of the pearl samples.

结果显示，其多分布于珍珠珠核部位，也可出现在珍珠表面。

Mucus type: the cells of this type produce a lot of mucus which presses the nucleus into a ring shape.

粘液型：这种类型的细胞产生大量的粘液将细胞核挤压成环状。

It constitutes the essential nucleus of the self and the access to it in our patients is often attained only with the greatest difficulty.

它组成自我的基本核心，从我们父母身上接近它，往往是费尽困难，才能获得。

Gene treatment Patients with Parkinson's have reduced levels of a chemical - GABA - in part of the brain known as the subthalamic nucleus.

接受基因疗法治疗的帕金森病患者中，化学物质GABA水平有所降低，该化学物在脑部也被称为氨基丁酸。

That group eventually provided the nucleus of al-Qaeda, which bin Laden founded in 1988 as the war against the Soviets began to wind down.

本•拉登于1988年在反对苏联的战争开始平息之时建立了基地组织，而那一群人最终成为其核心成员。

In nuclear fusion, a pair of light nuclei unite (or fuse) together, form a nucleus of a heavier atom.

在核聚变的情况下，一对轻核合并（或聚合）在一起，形成一个较重的原子核。

That reminds me of atom: the movement of electron is irregular, however, it is always around the nucleus and within the atom.

这让我想起了原子：电子跑来跑去，没有规律，但始终围绕着一个核心在转。

Very high densities, close to that of an atomic nucleus.

它的密度非常高，接近于一个原子核。

Drift-II is more ambitious. If it works, it will be able to track such a recoiling nucleus through a device filled with gas.

而Drift-II的目标更加远大，如果可能，它可以在充满某种气体的装置中跟踪碰撞后的原子核。

We loved what she brought to the band, but I know it was hard for her to infiltrate our years as a tightly knit nucleus.

她给乐队带来的新鲜血液让我们欣喜，但充分融入我们，融入这个已然形成的紧密核心对她来说也并非易事。

One of first things biologists noticed was that genes reside in different parts of the nucleus depending on their activity.

生物学家首先注意到的是，基因根据其活动的程度，在细胞核的位置也不同。

Gliacyte was more sensitive than neuron. A small number of enveloped virions were observed in nucleus and cytoplasm of gliacyte and neuron.

胶质细胞内的核衣壳多于神经元，胶质细胞和神经元的细胞质内和胞外可见少量有包膜的完整病毒。

It was just a garden variety platinum nucleus pretending to be a monopole by cleverly decaying into osmium and tantalum.

它只是一个巧妙地通过衰变成锇和钽而假装成磁单极子的普通的铂原子核。

Just as the planets revolve about the sun, planetary electrons are thought of as revolving about the nucleus.

正像行星围绕太阳转一样，行星般的电子被认为是围着原子核转的。

The star to be moving rapidly, perhaps in an orbit around the densely concentrated stars of the galactic nucleus.

这颗星看来正在以高速运动着，其运动轨道大概就围绕着由高度密集的恒星所构成的银河系核心。

As is shown in Fig. One, an atom consists of a nucleus and a number of electrons.

如图一所示，原子由一个原子核和若干个电子组成。

The total mass of an atom is determined very nearly by the total number of protons and neutrons in its nucleus.

一个原子的总重量可以近似取决于这个原子核中的质子数和中子数之和。